Filter.



W. s. ELLIOTT.

FILTER. I APPLIGATION 1111111) 1111.3. 1912, 1,058,737. Patented Apr.15, 1913.

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WW I a? W. S. ELLIOTT.

FILTER. APPLIOATION FILED FEB.3, 1912.

Patented Apr 15, 1913..

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WITNESSES UNITED sTAtr s PATENT OFFICE.

WILLIAM S. ELLIOTT, PITTSBURGH, PENNSYLVANIA.

' FILTER.

' Specification of Letters Patent.

Application filed February 3, 1912. Serial N 0. 675,311.

To all whom it may concern Be it known that 1, Human S. ELLIOTT, ofPittsburgh,Allegheny county, Pennsylvania, have invented a new anduseful Imn'oveinent in Filters, of which the following is a full, clear,and exact description, reference being had to the accompanying drawings,forming part of this specification.

My'invention has relation to filters; and

is designed to provide a filter element, or

bag, of novel character and construction, having a large amount offilter area; also to provide means of simple and convenient characterwhereby the filter element of the bag may be readily removed from thefilter chamber for cleaning or renewal.

The presentapplication is related to my pending application No. 569,082,filed June 27th, 1910, being in part for subject-matte divided out ofthat application.

The nature of my invention will be best understood by reference to theaccompanying drawing, which will now be described, it being premised,however, that the invention is susceptible ofvarious other embodiments,and that it may be changed in various ways within the scope of theappended claims.

In the accompanying drawings, forming part of this specification, Figure1 is a ver- .tic-al section of one form of filter embodying with thefilter chamber 15.

my invention; Fig. 2 is a plan View of one of the cages or rings; Fig. 3is a Side View of the same; Figs. 1 and 5 are fragmentary sectionalviews showing two different steps in the operation of forming the filterbag; and Fig. 6 is a fragmentary sectional view showing a modified formof the filter bag.

, In the drawings, the numeral 2 :designates the bodyof a filter casing,which is shown in Fig. 1 .as being of the type described in my saidapplication 569,082. The base portion of the casing has an inlet chamber3, whose inlet port 4 is controlled by a suitable valve 5 seated in avalve casing 6. The base also has therein an outlet chamber 7 whoseoutlet port 8 is controlled by suitable valve 9 seated in a. valvecasing 11 at the opposite side of the base from the valve casing 6. Thetwo chambers 3 and 7 are separated from each other by the partition wall12, and the top of the chamber 3 is formed by a horizontal Wall 13having theret-hrough an opening 14 communicating This chamber PatentedApr. 15,1913. 4

15 has a bottom opening 16 communicating with the outlet chamber 7.

17 designates an open cylinder having a reduced lower end portion 17which seats within the opening 14. This cylinder has a plurality ofslots or openings 18 which communicate with the chamber .15.

19 designates a valve member, which is arranged to seat partially withinand to close the lower end of the cylinder 17. This valve member iscarried by a vertically movable stem 20, which extends upwardly throughthe cylinder 16 and through a bearing in the top 21 at the upper end ofthe cylinder, and has a button or handle 22 at its upper end- Thisbutton'or handle preferably has a projection 23, which is engaged by arecess 24 in the under side of the removable cover 25 of the chamber 15.

The filter element or bag is formed and seated around the cylinder 17.In the forms shown in Figs. 1, 4 and 5, this bag is formed from acylinder of fabric, open at its ends, its lower end being fastened asindicated at 26 around the cylinder 17 just above supporting arms 27secured to said cylinder. A bottom ring 28, which is preferably ofslightly greater diameter than the internal dropped within the cylinder,after which the fabric is gathered inwardly around said ring and is thenpassed upwardly through a ring 29 above the ring 28 and of smallerdiameter than the ring 28, and thence upwardly and around another ring28 placed above the lower one. In this manner the fabric cylinder iswoven back and forth between the alternating rings 28 and 29 until afilter element or bag of the desired length and capacity is formed. Theupper end of the fabric cylinder is then gathered together and tiedaround the valve stem 20, as shown at 31 in Fig. 1. The members 30 inaddition to carrying the forming rings 29, also serve'as spacers andsupports for the series of accordion-like folds of the bag and maintainsuch folds in their proper spaced relation. The inner'rings 29 form partof spacers or formers 80, such as shown in detail in Figs. 2 and 3. Eachof these spacers and formers consist of one of the inner rings 29,composed of one or more strands of wire and two outer rings 29 spacedvertically from each other, one above and one below the plane of thering 29. The two outer rings 29 have suitable vertical spacers 29", andthe inner and outer rings are also connected by a series of tie wires29. Theliquid to be filtered flows upwardly from the inlet chamber 3into the cylinder 17 and thence through the slots 18 into the filter bagand through the same into the chamber 15, and

.thence downwardly to the outle chamber 7.

In the manner described for forming the filter bag or element, it willbe seen that a very large' area of. filtering surface is obtained, thefiltering area bemgin fact Very much greater than the'area of thesurrounding casing. When it is desired to remove the filter bag to becleaned, or renewed, the cover 25 is first removed. The valve 19 is thenraised by means of the handle or button 22 to bring the valve member 19to its seat at the lower end 17 of the cylinder 17, and thus prevent thecontents of the filter bag from falling through into the inlet chamberwhen the bag is lifted. As soon as the valve 19 comes into seatingengagement with the cylinder 14, it has a lifting action on the filterelement as a whole, including the central pipe or filter support, whichcan then be removed as a unit from the chamber 15. This operation can bevery quickly and readily effected, the inlet valve for the chamber 3being of course closed.

32 designates a connection for a flush pipe, and 3 3 designate drainageconnections, thus providing .for full flushing and cleaning of theinterior of the casing.

The modification shown in Fig. 6 differs mainly from that shown in theother figures, in that the filter bag 34 is formed of two layers offabric instead of art-single layer. In fo'rining this bag, the fabriccylinder is turned inside out for half its length, the bottom edge beingdrawn up through to the open top, and a ring 35 being pushed in' between the two layers. The two layers are then woven back and forthbetween a series of rings 35 and inner rings 36, as in the form firstdescribed. The rings 36 form' I part of formers and supports 37 t whichare generally similar to those first described.

It will be obvious that my invention is not limited to the particularway in which these formers and supports are constructed, but

that these may be made invarious ways for use 1n connectlon with theseries of outer rings 50 as to give the bag the desired shape andproperly support the folds thereof.

\Vhat I claim is 1. A filter element comprising a fabric bag or cylinderwoven in and out over two sets of'rings of different diameters to form aseries of accordion-like folds, one set of said-rings having spacing andsupportin means extending between adjacent folds an an interior inletmember within the fabric bag or cylinder,substantially as described.

2. A filter element comprising a fabric bag or cylinder woven in and outover two sets of rings of different diameters and forming a series ofaccordion-like folds, one set of said rings consisting of cage-likemembers which act as spacers and supports for the series of folds toether with an inlet member extending interlorly of the fabric bag orcylinder, substantially as described.

3. A filter comprising acentral perforated pipe member having an inletopening at one end portion, a filtering element sur roundingsaid member,and a valve carried by said member and arranged to open and close theinlet opening thereof, substantially as described.

4. A filter comprising a central perforated pipe member, one end of saidmember aving an inlet opening and forming a seat for a valve, afiltering element surrounding said pipe member, and a valve adapted tocontrol said opening, the stem of said valve extending outwardly throughsaid pipe member, substantially as described.

5. In a filter, the combination with a filter chamber having an openingin its bottom wall, of a perforated central member removably secured insaid opening, a filtering element surrounding said central member, avalve carried by said central member, and arranged to close the lowerend of said member, said valve and its stem forming lifting means,whereby said central member and the filter element may be removed fromthe chamber as a unit, substantially as described.

In testimony whereof, I have hereunto set 100 Witnesses:

A. F. TIBBE'I'IS, H. M. CoRwIN.

